Title:
Demonstrating Biochar's Potential to Filter Siloxanes from Landfill Gas
Author(s):
Laurila, N., Kettunen, H., Anttalainen, O.
Document(s):
Paper
Poster
Abstract:
Previously, biodegradable waste ended up in a landfill, where it decomposed and produced landfill gas, which can be utilized in a gas power plant for heat and electricity production. However, the gas formed in the landfill contains impurities such as siloxanes, which are harmful substances to the process equipment. Siloxanes form silicon dioxide, which accumulates on surfaces, corroding engine parts, and reducing the efficiency of heat exchange surfaces. Activated carbon, made from fossil raw materials, is commonly used in raw gas purification, but it could be replaced with a cheaper and more eco-friendly biochar. The study investigated the effectiveness of biochar in purifying landfill gas from siloxanes through laboratory and field experiments. For biochar, the experiments achieved a filtration efficiency of >99.2%, and for activated carbon the efficiency was >99.9% with 19.2 ppm total siloxane concentration in raw gas. In the study, siloxanes in gas were monitored using a DMS analyser, and their concentration was determined by sampling them into VOC tubes.
Keywords:
gas cleaning, biochar, landfill gas
Topic:
Sustainable Resources for Decarbonising the Economy
Subtopic:
Innovative biomass production for energy integrated into traditional agri-forestry systems
Event:
32nd European Biomass Conference and Exhibition
Session:
1DV.5.18
Pages:
191 - 196
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-1DV.5.18
Price:
FREE
